Used on 1940 supercharged, carburetor model 473-S and non-supercharged engines, carburetor model 472-S. The body casting number for both carburetors is 309. The thermostatic coil setting is one notch rich.
The unloader setting uses gauge number T109-83, choke valve clearance ½.
The float inlet valve number is 25-42S, the intake hole size #38.
The throttle valve setting for the idle port opening is .133-.137, vacuum port height .029-.034
The anti-percolator setting use gauge T109-29, throttle opening .030
The float level setting is 3/8 and to check the level, invert cover, measure from top edge of machined projection on cover at free end of float to top of soldered seam. Adjust by bending lip of float lever.
Turning the idle setscrew ½ to 1 ½ turns sets the idle setting. Idle speed 7-8 mph.
The accelerator pump stroke is 19/64 using the medium pump stroke.
The 2014 Southern Cross Region of the Graham Owners Club International rally in Adelaide, Australia.
This was their 7th National Rally that is held every other year. Tuesday sign in day with a pancake breakfast and that evening was pizza night. In between was a bus tour of Adelaide. Wednesday was a drive to Goolwa and then a train ride to Victor Harbour. Thursday riding in the Grahams through the Adelaide hills to Birdwood with a stop at the largest rocking horse in the world for our morning tea. We ended up at the Birdwood Mill National Motor Museum. Friday stopping at Carrick Hills with a guided tour of the house and gardens and had our morning tea. At Handorf we visited the "Cedars" which is the house of the famous Australian artist Hans Heysen. Saturday on the way to Strathalbyn we stopped at "Peaches" to view a collection of antique vehicles and farm machinery also thea tour of the beautiful house. Sunday and a trip to Barossa Valley with a morning tea at Keis Cellar then off to Karl Linder's to view his collection of Jaguars. After traveling to Mengler's Hill Lookout we arrived at Bethany oval where we wre joined by the "Gawler Veteran Vintage & Classic Vehicle Club. Afterward on the way back there were plenty of wineries to sample their wine. Monday, the last day, we visited the Keswick Military Barracks for a guided tour of the military museum. Monday night was the farewell dinner. All too soon it was over and time to depart.